This video excerpt from Dr. Kirkby’s 2009 CERN Aerosol Alien Biologypresentation makes it clear that IPCC climate scientists, Geoengineers and government agencies are fully aware that jet aircraft are dumping aerosols into the atmosphere with the effect of deliberate and covert climate manipulation.

But even Dr. Kirkby may not be aware that these aerosols contain much more than chemicals for climate manipulation. Bio-engineered pathogens have been systematically sprayed on entire populations to infect the environment with a “New Biology” of cross-domain organisms that manifest as “Morgellons Syndrome” in man. [Chemtrails and Synthetic Alien Biology]

Jasper Kirkby is a particle physicist currently engaged with cloud physics research at CERN – the European Organization for Nuclear Research.

Except that's what the conspiracy theorists' interpretation of that 2009 presentation was, because the term "aerosols" was used and (to them) "therefore something that has been sprayed." Aerosols are anything that floats about in the air, including water droplets. Clouds are aerosols. What Dr. Kirby was talking about was contrails started off by jet engine exhausts, consisting of ice crystals and (to begin with) some soot.

So the statement by Dr. Kirby that "these are clouds seeded by jets dumping aerosols into the upper atmosphere" is correct. Again, as per this diagram:

The contrails are a by-product of the enormous worldwide demand for air travel and the only way to stop them completely would be to ground all aircraft worldwide.

As far as geoengineering is concerned, various proposals have been put forward of possible methods of combating global warming, none of which are actually happening yet and possibly never will. If it happens, it will be in the stratosphere at altitudes of 60,000 to 80,000 feet (unlike the claim that it's being done right now by commercial airliners at 30,000 feet or so) and you won't even be able to see it.

Another thing you have to remember is that clouds are very heavy. A contrail stretching for miles and spreading wide will weigh thousands of tons and there is no aircraft in existence that can take off with a payload of more than a few hundred tons at the very most.